# Copyright 2020 Stanford University, Los Alamos National Laboratory
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#

from __future__ import absolute_import
from __future__ import print_function
import sys

# Default backend: FlexFlow.
_BACKEND = 'flexflow'

# import backend
if _BACKEND == 'flexflow':
    sys.stderr.write('Using flexflow backend.\n')
    from .flexflow_backend import *
else:
    raise ValueError('Unknown backend: ' + str(_BACKEND))


def backend():
    """Publicly accessible method
    for determining the current backend.
    """
    return _BACKEND